Anne M. Kenny

Bio: Anne M. Kenny is an academic researcher from University of Connecticut Health Center. The author has contributed to research in topics: Osteoporosis & Bone remodeling. The author has an hindex of 48, co-authored 118 publications receiving 9006 citations. Previous affiliations of Anne M. Kenny include Tufts University & University of Nebraska Medical Center.

The FNIH Sarcopenia Project: Rationale, Study Description, Conference Recommendations, and Final Estimates

Abstract: Background. Low muscle mass and weakness are common and potentially disabling in older adults, but in order to become recognized as a clinical condition, criteria for diagnosis should be based on clinically relevant thresholds and independently validated. The Foundation for the National Institutes of Health Biomarkers Consortium Sarcopenia Project used an evidence-based approach to develop these criteria. Initial findings were presented at a conference in May 2012, which generated recommendations that guided additional analyses to determine final recommended criteria. Details of the Project and its findings are presented in four accompanying manuscripts.

Prevalence of Sarcopenia and Predictors of Skeletal Muscle Mass in Healthy, Older Men and Women

Abstract: Background. Sarcopenia refers to the loss of skeletal muscle mass with age. The objective of this study was to determine the prevalence of sarcopenia in a population of older, community-dwelling research volunteers. Methods. Appendicular skeletal muscle mass was measured by dual x-ray absorptiometry in 195 women aged 64 to 93 years and 142 men aged 64 to 92 years. We defined sarcopenia as appendicular skeletal muscle mass/height 2 (square meters) less than 2 standard deviations below the mean for young, healthy reference populations. We used two different reference populations and compared prevalence in our population to that reported in previous studies. Body mass index (BMI) was calculated and physical activity and performance were measured with the Physical Activity Scale for the Elderly, the Short Physical Performance Battery, and the Physical Performance Test. We measured health-related quality of life by using the SF-36 general health survey. Serum estrone, estradiol, sex hormone-binding globulin, parathyroid hormone, and 25-hydroxy vitamin D were measured in all participants and bioavailable testosterone was measured only in men. Leg press strength and leg press power were determined in men. Results. The prevalence of sarcopenia in our cohort was 22.6% in women and 26.8% in men. A subgroup analysis of women and men 80 years or older revealed prevalence rates of 31.0% and 52.9%, respectively. In women, skeletal muscle mass correlated significantly with BMI and levels of serum estrone, estradiol, and 25-hydroxy vitamin D; in men, it correlated significantly with BMI, single leg stance time, leg press strength, leg press power, SF-36 general health score, Physical Performance Test total score, and bioavailable testosterone levels. With the use of linear regression analysis, BMI was the only predictor of appendicular skeletal muscle mass in women, accounting for 47.9% of the variance (p < .05). In men, BMI accounted for 50.1%, mean strength accounted for 10.3%, mean power accounted for 4.1%, and bioavailable testosterone accounted for 2.6% of the variance in appendicular skeletal muscle mass (p <.05). Conclusions. Sarcopenia is common in adults over the age of 65 years and increases with age. BMI is a strong predictor of skeletal muscle mass in women and men. Strength, power, and bioavailable testosterone are further contributors in men. These data suggest that interventions to target nutrition, strength training, and testosterone replacement therapy should be further investigated for their role in preventing muscle loss with age.

Adverse events associated with testosterone replacement in middle-aged and older men: a meta-analysis of randomized, placebo-controlled trials

Abstract: Background. We performed a meta-analysis of randomized clinical trials to determine the risks of adverse events associated with testosterone replacement in older men. Methods. The MEDLINE database was searched from 1966 to April 2004, using testosterone as the indexing term; limits included human, male, � 45 years old, and randomized controlled trial. Of the 417 studies thus identified, 19 met the inclusion criteria: testosterone replacement for at least 90 days, men � 45 years old with low or low-normal testosterone level, randomized controlled trial, and medically stable men. Odds ratios (ORs) were pooled using a random effects model, assuming heterogeneous results across studies, and were weighted for sample size. Results. In the 19 studies that met eligibility criteria, 651 men were treated with testosterone and 433 with placebo. The combined rate of all prostate events was significantly greater in testosterone-treated men than in placebo-treated men (OR ¼1.78, 95% confidence interval [CI], 1.07‐2.95). Rates of prostate cancer, prostate-specific antigen (PSA) .4 ng/ml, and prostate biopsies were numerically higher in the testosterone group than in the placebo group, although differences between the groups were not individually statistically significant. Testosterone-treated men were nearly four times as likely to have hematocrit .50% as placebo-treated men (OR ¼3.69, 95% CI, 1.82‐7.51). The frequency of cardiovascular events, sleep apnea or death was not significantly different between the two groups. Conclusions. Testosterone replacement in older men was associated with a significantly higher risk of detection of prostate events and of hematocrit .50% than was placebo; hematocrit increase was the most frequent adverse event associated with testosterone replacement. These data reaffirm the need to monitor hematocrit, PSA, and digital examination of the prostate during testosterone replacement in older men.

Effects of Transdermal Testosterone on Bone and Muscle in Older Men With Low Bioavailable Testosterone Levels

Abstract: Background. A large proportion of men over 65 years of age have bioavailable testosterone levels below the reference range of young adult men. The impact of this on musculoskeletal health and the potential for improvement in function in this group with testosterone supplementation require investigation. Methods. Sixty-seven men (mean age 76 6 4 years, range 65‐87) with bioavailable testosterone levels below 4.44 nmol/l (lower limit for adult normal range) were randomized to receive transdermal testosterone (two 2.5-mg patches per day) or placebo patches for 1 year. All men received 500 mg supplemental calcium and 400 IU vitamin D. Outcome measures included sex hormones (testosterone, bioavailable testosterone, sex-hormone binding globulin [SHBG], estradiol, and estrone), bone mineral density (BMD; femoral neck, Ward’s triangle, trochanter, lumbar spine, and total body), bone turnover markers, lower extremity muscle strength, percent body fat, lean body mass, hemoglobin, hematocrit, prostate symptoms, and prostate specific antigen (PSA) levels. Results. Twenty-three men (34%) withdrew from the study; 44 men completed the trial. In these men, bioavailable testosterone levels increased from 3.2 6 1.2 nmol/l ( SD ) to 5.6 6 3.5 nmol/l ( p , .002) at 12 months in the testosterone group, whereas no change occurred in the control group. Although there was no change in estradiol levels in either group, estrone levels increased in the testosterone group (103 6 26 pmol/l to 117 6 33 pmol/l; p , .017). The testosterone group had a 0.3% gain in femoral neck BMD, whereas the control group lost 1.6% over 12 months ( p 5 .015). No significant changes were seen in markers of bone turnover in either group. Improvements in muscle strength were seen in both groups at 12 months compared with baseline scores. Strength increased 38% ( p 5 .017) in the testosterone group and 27% in the control group ( p 5 .06), with no statistical difference between the groups. In the testosterone group, body fat decreased from 26.3 6 5.8% to 24.6 6 6.5% ( p 5 .001), and lean body mass increased from 56.2 6 5.3 kg to 57.2 6 5.1 kg ( p 5 .001), whereas body mass did not change. Men receiving testosterone had an increase in PSA from 2.0 6 1.4 m g/l to 2.6 6 1.8 m g/l ( p 5 .04), whereas men receiving placebo had an increase in PSA from 1.9 6 1.0 m g/l to 2.2 6 1.5 m g/l ( p 5 .09). No significant differences between groups were seen in hemoglobin, hematocrit, symptoms or signs of benign prostate hyperplasia, or PSA levels. Conclusions. Transdermal testosterone (5 mg/d) prevented bone loss at the femoral neck, decreased body fat, and increased lean body mass in a group of healthy men over age 65 with low bioavailable testosterone levels. In addition, both testosterone and placebo groups demonstrated gains in lower extremity muscle strength, possibly due to the beneficial effects of vitamin D. Testosterone did result in a modest increase in PSA levels but resulted in no change in signs or symptoms of prostate hyperplasia.

Grip Strength Cutpoints for the Identification of Clinically Relevant Weakness

Abstract: Muscle weakness is related to poor physical performance and incident mobility limitations among older adults (1–6). Weakness is considered a key element of frailty (7) and, increasingly, of sarcopenia (8,9). Although the association between weakness and functional limitations is strong, there is no consensus regarding a cutpoint for identification of risk for functional problems. In order to identify population subgroups in whom weakness is a potential contributor to functional limitations, it is necessary to determine what constitutes a clinically relevant degree of weakness. This is the second in a series of reports from the Foundation for the National Institutes of Health (FNIH) Sarcopenia Project, which pooled data from multiple studies to develop and evaluate clinically relevant criteria for weakness and low muscle mass (10). The purpose of the analysis presented here was to identify cutpoints that distinguish weakness (measured by grip strength) associated with mobility impairment (measured by gait speed) using cross-sectional data (ie, to maximize concurrent validity). This analysis builds on previous research on the association between strength and walking speed using a data-driven approach across multiple populations and an analytic technique (Classification and Regression Tree [CART] analysis) designed to optimize concurrent validity in the context of complex interactions. Findings were used to address subsequent Project goals reported separately (11–13).

Standards of Medical Care in Diabetes

Abstract: XI. STRATEGIES FOR IMPROVING DIABETES CARE D iabetes is a chronic illness that requires continuing medical care and patient self-management education to prevent acute complications and to reduce the risk of long-term complications. Diabetes care is complex and requires that many issues, beyond glycemic control, be addressed. A large body of evidence exists that supports a range of interventions to improve diabetes outcomes. These standards of care are intended to provide clinicians, patients, researchers, payors, and other interested individuals with the components of diabetes care, treatment goals, and tools to evaluate the quality of care. While individual preferences, comorbidities, and other patient factors may require modification of goals, targets that are desirable for most patients with diabetes are provided. These standards are not intended to preclude more extensive evaluation and management of the patient by other specialists as needed. For more detailed information, refer to Bode (Ed.): Medical Management of Type 1 Diabetes (1), Burant (Ed): Medical Management of Type 2 Diabetes (2), and Klingensmith (Ed): Intensive Diabetes Management (3). The recommendations included are diagnostic and therapeutic actions that are known or believed to favorably affect health outcomes of patients with diabetes. A grading system (Table 1), developed by the American Diabetes Association (ADA) and modeled after existing methods, was utilized to clarify and codify the evidence that forms the basis for the recommendations. The level of evidence that supports each recommendation is listed after each recommendation using the letters A, B, C, or E.

Sarcopenia: European consensus on definition and diagnosis Report of the European Working Group on Sarcopenia in Older People

Abstract: The European Working Group on Sarcopenia in Older People (EWGSOP) developed a practical clinical definition and consensus diagnostic criteria for age-related sarcopenia. EWGSOP included representatives from four participant organisations, i.e. the European Geriatric Medicine Society, the European Society for Clinical Nutrition and Metabolism, the International Association of Gerontology and Geriatrics-European Region and the International Association of Nutrition and Aging. These organisations endorsed the findings in the final document. The group met and addressed the following questions, using the medical literature to build evidence-based answers: (i) What is sarcopenia? (ii) What parameters define sarcopenia? (iii) What variables reflect these parameters, and what measurement tools and cut-off points can be used? (iv) How does sarcopenia relate to cachexia, frailty and sarcopenic obesity? For the diagnosis of sarcopenia, EWGSOP recommends using the presence of both low muscle mass + low muscle function (strength or performance). EWGSOP variously applies these characteristics to further define conceptual stages as 'presarcopenia', 'sarcopenia' and 'severe sarcopenia'. EWGSOP reviewed a wide range of tools that can be used to measure the specific variables of muscle mass, muscle strength and physical performance. Our paper summarises currently available data defining sarcopenia cut-off points by age and gender; suggests an algorithm for sarcopenia case finding in older individuals based on measurements of gait speed, grip strength and muscle mass; and presents a list of suggested primary and secondary outcome domains for research. Once an operational definition of sarcopenia is adopted and included in the mainstream of comprehensive geriatric assessment, the next steps are to define the natural course of sarcopenia and to develop and define effective treatment.

Sarcopenia: Revised European consensus on definition and diagnosis

Abstract: Background in 2010, the European Working Group on Sarcopenia in Older People (EWGSOP) published a sarcopenia definition that aimed to foster advances in identifying and caring for people with sarcopenia. In early 2018, the Working Group met again (EWGSOP2) to update the original definition in order to reflect scientific and clinical evidence that has built over the last decade. This paper presents our updated findings. Objectives to increase consistency of research design, clinical diagnoses and ultimately, care for people with sarcopenia. Recommendations sarcopenia is a muscle disease (muscle failure) rooted in adverse muscle changes that accrue across a lifetime; sarcopenia is common among adults of older age but can also occur earlier in life. In this updated consensus paper on sarcopenia, EWGSOP2: (1) focuses on low muscle strength as a key characteristic of sarcopenia, uses detection of low muscle quantity and quality to confirm the sarcopenia diagnosis, and identifies poor physical performance as indicative of severe sarcopenia; (2) updates the clinical algorithm that can be used for sarcopenia case-finding, diagnosis and confirmation, and severity determination and (3) provides clear cut-off points for measurements of variables that identify and characterise sarcopenia. Conclusions EWGSOP2's updated recommendations aim to increase awareness of sarcopenia and its risk. With these new recommendations, EWGSOP2 calls for healthcare professionals who treat patients at risk for sarcopenia to take actions that will promote early detection and treatment. We also encourage more research in the field of sarcopenia in order to prevent or delay adverse health outcomes that incur a heavy burden for patients and healthcare systems.